Spain's potato omelette, slow-cooked thick and juicy with potatoes confit in olive oil and sweet onion, bound by free-range eggs and turned twice to a soft, almost-set centre. Cold on a counter, warm at the table.

The first written reference to tortilla de patata dates to a Basque-province document from 1817, ascribing its invention to Basque household kitchens stretching meagre eggs with potato. The dish became Spain's universal counter pintxo by the 1950s. La Vina del Ensanche, Sorginzulo and Cafe Iruna run defensible versions in Bilbao; Sorginzulo's onion-heavy tortilla has been the cult choice for the last decade.

4 editor picks for Tortilla de Patata in Bilbao, ranked by editorial score. All Bilbao signature dishes · Tortilla de Patata across every city.